213423046709 has 4 divisors (see below), whose sum is σ = 214855416300. Its totient is φ = 211990677120.

The previous prime is 213423046673. The next prime is 213423046721. The reversal of 213423046709 is 907640324312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122445406084 + 90977640625 = 349922^2 + 301625^2 .

It is a cyclic number.

It is not a de Polignac number, because 213423046709 - 2²⁴ = 213406269493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213423046789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 716184572 + ... + 716184869.

It is an arithmetic number, because the mean of its divisors is an integer number (53713854075).

Almost surely, 2^213423046709 is an apocalyptic number.

It is an amenable number.

213423046709 is a deficient number, since it is larger than the sum of its proper divisors (1432369591).

213423046709 is a wasteful number, since it uses less digits than its factorization.

213423046709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432369590.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 213423046709 in words is "two hundred thirteen billion, four hundred twenty-three million, forty-six thousand, seven hundred nine".